{3x-2y=4 { x/2-y+1/3=1 {4y-3x=-2 {3x+2y=1代入消元法解下列方程组 (1){3x-2y=4 (2) { x/2-y+1/3=1 (3){2x-y=5 (4){x/4+y/3=4/3 {4y-3x=-2 {3x+2y=1
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/02 01:39:20
![{3x-2y=4 { x/2-y+1/3=1 {4y-3x=-2 {3x+2y=1代入消元法解下列方程组 (1){3x-2y=4 (2) { x/2-y+1/3=1 (3){2x-y=5 (4){x/4+y/3=4/3 {4y-3x=-2 {3x+2y=1](/uploads/image/z/1107592-16-2.jpg?t=%7B3x-2y%3D4+%7B+x%2F2-y%2B1%2F3%3D1+%7B4y-3x%3D-2+%7B3x%2B2y%3D1%E4%BB%A3%E5%85%A5%E6%B6%88%E5%85%83%E6%B3%95%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%E7%BB%84+++++%281%29%7B3x-2y%3D4++++++%282%29++++++%7B+x%2F2-y%2B1%2F3%3D1++++++%283%29%7B2x-y%3D5+++++++++++%284%29%7Bx%2F4%2By%2F3%3D4%2F3+++++++++++++++++++++++++++++++++++++++++++++++++%7B4y-3x%3D-2++++++++++++++++%7B3x%2B2y%3D1)
{3x-2y=4 { x/2-y+1/3=1 {4y-3x=-2 {3x+2y=1代入消元法解下列方程组 (1){3x-2y=4 (2) { x/2-y+1/3=1 (3){2x-y=5 (4){x/4+y/3=4/3 {4y-3x=-2 {3x+2y=1
{3x-2y=4 { x/2-y+1/3=1 {4y-3x=-2 {3x+2y=1
代入消元法解下列方程组 (1){3x-2y=4 (2) { x/2-y+1/3=1 (3){2x-y=5 (4){x/4+y/3=4/3
{4y-3x=-2 {3x+2y=1 {x:y=4:3 {5(x-9)=6(y-2)
{3x-2y=4 { x/2-y+1/3=1 {4y-3x=-2 {3x+2y=1代入消元法解下列方程组 (1){3x-2y=4 (2) { x/2-y+1/3=1 (3){2x-y=5 (4){x/4+y/3=4/3 {4y-3x=-2 {3x+2y=1
1)3x=4+2y;4y-(4+2y)=-2; y=1 x=2
2) y=x/2-2/3,3x+2*(x/2-2/3)=1,x=7/12 y= -3/8
3) y=2x-5,x:(2x-5)=4:3,x=4 y=3
4) 3x+4y=16,9x+12y=48,12y=48-9x,5x-45=6y-12,10x-90=12y-24,10x-90=(48-9x)-24,x=6 y= -1/2